Wave propagation in waveguide arrays with alternating positive and negative couplings
Publication date
2010-05
Document type
Research article
Author
Efremidis, Nikolaos K.
Zhang, Peng
Chen, Zhigang
Christodoulides, Demetrios N.
Rüter, Christian E.
Organisational unit
Scopus ID
Conference
Nonlinear Photonics 2010
Series or journal
Physical review. A, Atomic, molecular, and optical physics The American Physical Society.
Periodical volume
81
Periodical issue
5
Part of the university bibliography
✅
Language
English
Abstract
We introduce a waveguide array model with alternating positive and negative couplings between adjacent waveguides. Two different settings where such a model can be realized are identified as arrays of defects in Bragg gratings and arrays with propagation constants that periodically vary along the propagation direction. We analyze the properties of wave propagation in such waveguide arrays and find several interesting properties that have no counterpart in the case of arrays with constant couplings. These include the beam self-splitting, self-induced Talbot oscillations, symmetric evolution of Bloch oscillations, and new families of lattice solitons. © 2010 The American Physical Society.
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